{
  "manageEntity": {
    "action": "Save",
    "entityId": "2113234336",
    "entityType": "Track",
    "nonce": "0x4a18923afb86d3bf1f634cf251313379d325e6ca97ec596a58cf8fa60cb73194",
    "signature": "0x623056f2f903d647f571a26ea461735312d62b34f293872ff959ea729298b54e0a82947f9994bea75ac83e7df7e6c57938c5d6e1373db0e207e42a6772e7e6c11b",
    "signer": "0x8a7825780b6dFb84338c2B3fb395483848Fbd047",
    "userId": "234788997"
  }
}